Referring the illustrated psychrometric chart, suppose during the cooling season that air passes over a cooling coil with a mean surface temperature above the dew point temperature, and this results in sensible heat loss with no change in moisture content. What statement represents the direction of the air conditioning process line? GS-RA-22

Illustration GS-RA-22: the U.S. Coast Guard has not released this illustration.

Question

Referring the illustrated psychrometric chart, suppose during the cooling season that air passes over a cooling coil with a mean surface temperature above the dew point temperature, and this results in sensible heat loss with no change in moisture content. What statement represents the direction of the air conditioning process line? GS-RA-22

Illustration GS-RA-22: the U.S. Coast Guard has not released this illustration.

Accepted Answer

Option B: The air conditioning process line is horizontal with the coil outlet to the left of the coil inlet.. Sensible cooling without dehumidification occurs when the cooling coil surface temperature is above the dew point. This process removes heat while maintaining constant moisture content. On the psychrometric chart, this appears as a horizontal line moving to the left, as the dry-bulb temperature decreases toward the coil surface temperature.